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    SubjectRe: uvcvideo: Unknown video format,00000032-0002-0010-8000-00aa00389b71
    Date
    Hi Nicolas,

    On Tuesday, 20 March 2018 19:45:51 EET Nicolas Dufresne wrote:
    > Le mardi 20 mars 2018 à 13:20 +0100, Paul Menzel a écrit :
    > > Dear Linux folks,
    > >
    > >
    > > On the Dell XPS 13 9370, Linux 4.16-rc6 outputs the messages below.
    > >
    > > ```
    > > [ 2.338094] calling uvc_init+0x0/0x1000 [uvcvideo] @ 295
    > > [ 2.338569] calling iTCO_wdt_init_module+0x0/0x1000 [iTCO_wdt] @ 280
    > > [ 2.338570] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
    > > [ 2.338713] iTCO_wdt: Found a Intel PCH TCO device (Version=4,
    > > TCOBASE=0x0400)
    > > [ 2.338755] uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD
    > > (0bda:58f4)
    > > [ 2.338827] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
    > > [ 2.338851] initcall iTCO_wdt_init_module+0x0/0x1000 [iTCO_wdt]
    > > returned 0 after 271 usecs
    > > [ 2.340669] uvcvideo 1-5:1.0: Entity type for entity Extension 4 was
    > > not initialized!
    > > [ 2.340670] uvcvideo 1-5:1.0: Entity type for entity Extension 7 was
    > > not initialized!
    > > [ 2.340672] uvcvideo 1-5:1.0: Entity type for entity Processing 2 was
    > > not initialized!
    > > [ 2.340673] uvcvideo 1-5:1.0: Entity type for entity Camera 1 was not
    > > initialized!
    > > [ 2.340736] input: Integrated_Webcam_HD: Integrate as
    > > /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.0/input/input9
    > > [ 2.341447] uvcvideo: Unknown video format
    > > 00000032-0002-0010-8000-00aa00389b71
    >
    > While the 0002 is suspicious, this is pretty close to a color format.
    > I've recently come across of similar format using D3DFORMAT instead of
    > GUID. According to the vendor*, this camera module includes an infrared
    > camera (340x340), so I suspect this is to specify the format it
    > outputs. A good guess to start with would be that this is
    > D3DFMT_X8L8V8U8 (0x32).

    Isn't 0x32 D3DFMT_L8, not D3DFMT_X8L8V8U8 ?

    > To test it, you could map this
    > V4L2_PIX_FMT_YUV32/xRGB and see if the driver is happy with the buffer
    > size.

    VideoStreaming Interface Descriptor:
    bLength 30
    bDescriptorType 36
    bDescriptorSubtype 5 (FRAME_UNCOMPRESSED)
    bFrameIndex 1
    bmCapabilities 0x00
    Still image unsupported
    wWidth 340
    wHeight 340
    dwMinBitRate 55488000
    dwMaxBitRate 55488000
    dwMaxVideoFrameBufferSize 115600
    dwDefaultFrameInterval 166666
    bFrameIntervalType 1
    dwFrameInterval( 0) 166666

    340*340 is 115600, so this should be a 8-bit format.

    > Then render it to make sure it looks some image of some sort. A
    > new format will need to be defined as this format is in the wrong
    > order, and is ambiguous (it may mean AYUV or xYUV). I'm not sure if we
    > need specific formats to differentiate infrared data from YUV images,
    > need to be discussed.

    If the format is indeed D3DFMT_L8, it should map to V4L2_PIX_FMT_GREY (8-bit
    luminance). I suspect the camera transmits a depth map though.

    > *https://dustinweb.azureedge.net/media/338953/xps-13-9370.pdf
    >
    > > [ 2.341450] uvcvideo: Found UVC 1.00 device Integrated_Webcam_HD
    > > (0bda:58f4)
    > > [ 2.343371] uvcvideo: Unable to create debugfs 1-2 directory.
    > > [ 2.343420] uvcvideo 1-5:1.2: Entity type for entity Extension 10 was
    > > not initialized!
    > > [ 2.343422] uvcvideo 1-5:1.2: Entity type for entity Extension 12 was
    > > not initialized!
    > > [ 2.343423] uvcvideo 1-5:1.2: Entity type for entity Processing 9 was
    > > not initialized!
    > > [ 2.343424] uvcvideo 1-5:1.2: Entity type for entity Camera 11 was
    > > not initialized!
    > > [ 2.343472] input: Integrated_Webcam_HD: Integrate as
    > > /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5:1.2/input/input10
    > > [ 2.343496] usbcore: registered new interface driver uvcvideo
    > > [ 2.343496] USB Video Class driver (1.1.1)
    > > [ 2.343501] initcall uvc_init+0x0/0x1000 [uvcvideo] returned 0 after
    > > 5275 usecs
    > > ```
    > >
    > > Please tell me, what I can do to improve the situation.

    --
    Regards,

    Laurent Pinchart

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